<!DOCTYPE html> <html> <body> <h1>Element 对象</h1> <h2>dir 属性</h2> <p id="myP">点击 "试一试" 可更改我的文本方向。</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { document.getElementById("myP").dir = "rtl"; } </script> </body> </html>